Voters in Massachusetts approved a law Tuesday allowing people to use marijuana for medicinal purposes, NBC News projected.

It’s one of six states in which voters are being asked to decide on a wide array of laws around legalizing marijuana for medicinal or recreational purposes.

In three of those states – Colorado, Oregon and Washington – voters were deciding whether to allow people over 21 to use marijuana for any purpose.

In addition to Massachusetts, voters in Arkansas also are being asked to approve the use of marijuana for medicinal purposes. In Montana, they are being asked whether to revamp an existing law to make it more restrictive.